Double chair



FIG. 1 is a left side view of a double chair showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a perspective view thereof. 

CLAIM The ornamental design for a double chair, as shown and described. 